Performance in iOS (Swift)

In Swift, memory management is done for you automatically using Automatic Reference Counting. (See Memory Management) Allocation is the process of reserving a spot in memory for an object, and in Swift understanding the performance of such requires some understanding of the heap and the stack. The heap is a memory location where most objects get placed, and you may think of it as a storage shed. The stack, on the other hand, is a call stack of functions that have led to the current execution. (Hence, a stack trace is a sort of printout of the functions on the call stack.)